| 摘要 |
The device can record voices using an all-directional recording microphone (28) positioned centrally w.r.t. two loudspeakers (16). The loudspeakers surround the microphone in its immediate vicinity, and together with the microphone form a voice recording and voice replaying sound unit, which is connected to an adaptive signal processor. The appts. records and transmits voices and replays them in full duplex. There is also a voice communicator together with an adaptive signal processor (DSP), with an interface (47) for the communicator. The interface cancels echoes and acoustic feedback |
